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Highly sensitive optical microresonator sensors for photoacoustic imaging

Li, J; Taylor, A; Papakonstantinou, I; Zhang, E; Beard, P; (2014) Highly sensitive optical microresonator sensors for photoacoustic imaging. In: Oraevsky, AA and Wang, LV, (eds.) Proceedings of the Photons Plus Ultrasound: Imaging and Sensing 2014. (pp. 89430C-1-89430C-10). SPIE: San Francisco, CA, United States. Green open access

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Abstract

We present novel concave Fabry Perot (FP) sensor arrays for photoacoustic imaging which were fabricated using a high-precision inkjet printing approach to produce the cavity and employed physical vapor deposition to form the dielectric mirrors. Our concave FP cavity design provides excellent beam confinement within the cavity enabling high finesse and thus high sensitivity to be achieved. Two such concave sensors are evaluated in terms of their sensitivity and acoustic bandwidth. A 66 μm thick concave sensor is shown to provide a noise equivalent pressure (NEP) of 85 Pa and an acoustic bandwidth of 16 MHz, and can potentially be used as a sensitive broadband sensor for superficial imaging. A 250 μm thick sensor with an NEP of 12 Pa and acoustic bandwidth of 4 MHz was also developed for deep tissue imaging applications.

Type: Proceedings paper
Title: Highly sensitive optical microresonator sensors for photoacoustic imaging
Event: SPIE BiOS Conference on Photons Plus Ultrasound: Imaging and Sensing 2014
Location: San Francisco, CA
Dates: 02 February 2014 - 05 February 2014
Open access status: An open access version is available from UCL Discovery
DOI: 10.1117/12.2037015
Publisher version: https://doi.org/10.4108/i10.1117/12.2037015
Language: English
Additional information: This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions.
Keywords: Medical Imaging, Photoacoustics, non-invasive imaging, deep tissue imaging, Fabry Perot sensor, sensor array, concave cavity, ultrasound, Sensors, Acoustics, Mirrors, Visibility,Protactinium,Reflectivity, Wavefronts
UCL classification: UCL
UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Biochemical Engineering
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Electronic and Electrical Eng
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Med Phys and Biomedical Eng
URI: https://discovery.ucl.ac.uk/id/eprint/1419129
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